EP3509809B1 - Aerosolbehälter aus kunststoff - Google Patents

Aerosolbehälter aus kunststoff Download PDF

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Publication number
EP3509809B1
EP3509809B1 EP17746066.4A EP17746066A EP3509809B1 EP 3509809 B1 EP3509809 B1 EP 3509809B1 EP 17746066 A EP17746066 A EP 17746066A EP 3509809 B1 EP3509809 B1 EP 3509809B1
Authority
EP
European Patent Office
Prior art keywords
aerosol container
preform
container according
plastic
standing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17746066.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3509809A1 (de
Inventor
Robert Siegl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alpla Werke Alwin Lehner GmbH and Co KG
Original Assignee
Alpla Werke Alwin Lehner GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alpla Werke Alwin Lehner GmbH and Co KG filed Critical Alpla Werke Alwin Lehner GmbH and Co KG
Priority to PL17746066T priority Critical patent/PL3509809T3/pl
Publication of EP3509809A1 publication Critical patent/EP3509809A1/de
Application granted granted Critical
Publication of EP3509809B1 publication Critical patent/EP3509809B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/02—Machines characterised by the incorporation of means for making the containers or receptacles
    • B65B3/022—Making containers by moulding of a thermoplastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/023—Neck construction
    • B65D1/0246—Closure retaining means, e.g. beads, screw-threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps
    • B65D83/207—Actuators comprising a manually operated valve and being attachable to the aerosol container, e.g. downstream a valve fitted to the container; Actuators associated to container valves with valve seats located outside the aerosol container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/38—Details of the container body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/12—Compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
    • B29C2949/0781—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom characterised by the sprue, i.e. injection mark
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • B29C2949/0817—Wall thickness of the body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • B29C2949/0818—Wall thickness of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/082—Diameter
    • B29C2949/0826—Diameter of the body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/082—Diameter
    • B29C2949/0827—Diameter of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0829—Height, length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0829—Height, length
    • B29C2949/0836—Height, length of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3016—Preforms or parisons made of several components at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/302—Preforms or parisons made of several components at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3056—Preforms or parisons made of several components having components being compression moulded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6427—Cooling of preforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/26—Scrap or recycled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7142—Aerosol containers

Definitions

  • the invention relates to a plastic aerosol container according to the preamble of patent claim 1.
  • Aerosol containers are usually made of metal, in particular tinplate or aluminum. There are also a few glass aerosol containers on the market. This is intended in particular to take account of the EC 75/324 directive of the European Community, which applies to such containers with a packaging size of more than 50 ml.
  • the disadvantage of metal aerosol containers is that they can rust over time. Coatings used to protect the metal containers against rust, particularly on the inside, can also secrete undesirable substances such as bisphenol A. There is also some risk with metal containers that they may scratch the surfaces they come into contact with. Glass aerosol containers, on the other hand, have the disadvantage that they can break if handled improperly, for example if they fall to the ground.
  • plastics change their mechanical properties for the worse when they come into contact with, for example, soapy water or the like be able.
  • contact of the bottom of the container with soapy water such as is often found in bathrooms, can cause stress cracks in the bottom of the container, which can lead to failure of the bottom.
  • some plastics can be highly flammable. In the case of small wall thicknesses and, for example, combustible propellant gases, even a cigarette briefly touching the surface of the plastic container can lead to problematic situations.
  • US5206062A discloses an aerosol container made of plastic with a neck, the opening of which can be closed or closed in a pressure-tight manner by a valve unit that can be actuated by means of a pressure head, and which can be or is filled with a liquid or gaseous propellant and a liquid to be sprayed, the aerosol container being an injection-molded Preform is formed with an elongate, tube-like preform body, which has a preform base, which is surmounted in an axial direction by an integrally formed stand area, and at its opposite axial longitudinal end has a neck adjoining the preform body with the opening.
  • US5066081A discloses a preform made of plastic with a neck, the opening of which can be closed, the preform being designed as an injection-molded preform with an elongated, tube-like preform body which has a convex, dome-shaped preform base, which is surmounted in an axial direction by an integrally formed stand area, and has at its opposite axial longitudinal end a neck adjoining the preform body with the opening.
  • the invention provides an aerosol container made of plastic with a neck whose opening can be closed in a pressure-tight manner by a valve unit that can be actuated by means of a pressure head or is closed, and which can be filled or filled with a liquid or gaseous propellant and a liquid to be sprayed.
  • the aerosol container is designed as an injection molded preform with an elongated, tube-like preform body.
  • the preform body is closed with a convex, dome-shaped preform base, which is surmounted in an axial direction by a stand area formed in one piece. At its opposite axial longitudinal end the preform body connects to the neck with the opening.
  • the neck is designed to receive the valve assembly.
  • the preform is designed in one piece and the standing area is therefore also included in the one-piece design.
  • an aerosol container made of plastic which is formed as a preform in an injection molding process, proves to be sufficiently resistant to internal pressure without, due to the higher wall thickness of the preform compared to, for example, biaxially stretch-hardened containers in a blow molding process, leading to increased susceptibility to the phenomenon of "stress cracking". comes.
  • the base of the preform is surmounted axially by a stand area that is formed in one piece. This can prevent the preform base of the preform placed on a standing area of the standing area from coming into contact with soapy water or the like, which could result in stress cracks being produced in the preform base.
  • the injection point of the preform is also protected by the standing area that protrudes axially beyond the bottom of the container. As a rule, this can never be injected completely homogeneously and stress-free like the rest of the preform body. As a result, it is usually also more susceptible to short-term voltage peaks, such as those that could occur if you hit a solid surface.
  • the standing area can prevent the container bottom from suffering such surge stress.
  • the plastic aerosol container which is designed as an injection-molded preform, has a high degree of inherent rigidity and cannot be compressed by hand. Due to the greater wall thickness of the preform, it is also resistant to local higher temperature loads, such as could occur if the surface of the plastic container were accidentally touched by a cigarette holder.
  • An increased internal pressure within the meaning of the present invention is to be understood as meaning an internal pressure of 500 kPa to 1500 kPa at a room temperature of 22° C. which is higher than atmospheric pressure.
  • the plastic aerosol container is designed in such a way that it can withstand the increased internal pressure for at least six months from the production date.
  • the burst pressure of the aerosol canister is equal to or greater than 2200 kPa, and is preferably from 3000 kPa to 4000 kPa.
  • a standing surface of the standing area can project beyond an outside of the convex preform base at its deepest point by a distance of 1.5 mm to 3 mm, preferably by 1.8 mm to 2.6 mm. With the specified distances between an outside of the container bottom and the base, it can be ensured that the container bottom does not come into contact with a pool of soapy water or the like present on the base, for example.
  • the standing area can be designed as a hollow cylinder section that is closed in the circumferential direction.
  • the hollow-cylindrical standing area can also absorb radial forces and stresses, for example due to the increased internal pressure, and thus relieve the area around the injection point, which often tends to form stress cracks.
  • a wall thickness of the hollow-cylindrical standing area can be larger than, equal to or smaller than an average wall thickness of the preform body.
  • the standing area can be formed by a predetermined number of legs projecting axially beyond the preform base.
  • the legs are separated from one another by longitudinal slots extending essentially in the axial direction.
  • the provision of a predetermined number of legs that are separate from one another can increase the stability of the plastic container.
  • the longitudinal slits separating the legs allow liquid trapped by the standing area to be expelled to the outside.
  • plastic material can be saved by providing individual legs instead of a closed cylindrical section.
  • their predetermined number can be at least three.
  • the legs can taper towards their free axial longitudinal ends, ie the respective standing surfaces, so that a quasi-punctual support results when the aerosol container is placed on a surface. Since a plane is defined by three points, this can result in a very stable position and irregularities in the base can be compensated for.
  • a radially measured wall thickness of the standing area of the aerosol container can be from 1 mm to 6 mm.
  • a jacket of the standing area can be connected seamlessly to an outer wall of the preform body.
  • the casing and the outer wall of the preform body can be flush.
  • the jacket and outer wall of the preform can be designed as a right circular cylinder, neglecting draft angles.
  • the preform body can have an average wall thickness of 1 mm to 6 mm.
  • the wall thickness is measured perpendicular to the wall of the preform body.
  • a preform with the specified wall thicknesses can be produced in the injection molding process without excessive stresses occurring which would impair the mechanical properties of the preform. Stresses of this type can occur when the injection-molded preform cools and are higher the greater the difference between the outer diameter of the preform and its inner diameter, or the greater the wall thickness of the preform.
  • the stresses are a consequence of the different contraction of the outer wall and the inner wall of the injection molded preform. Furthermore, the stresses depend on the ratio of injection temperature to cooling temperature.
  • the bottom portion of the aerosol container is convex dome-shaped. This approximation to the spherical shape means that bending stresses in the floor area can be largely avoided.
  • the preform base also has a wall thickness of 1 mm to 6 mm in a further embodiment variant of the aerosol container, it is also possible in this area of the aerosol container Thermal stresses are largely avoided.
  • the wall thickness is measured perpendicular to the wall of the preform base.
  • the preform body has at least one transparent section which extends over its axial length.
  • This transparent section can allow a simple fill level check or, in conjunction with a scale, a very simple estimate of the dosage quantity, which can be relevant not only for medical applications such as asthma sprays or the like, but can also be useful for numerous other applications.
  • aerosol container can provide for its preform body to be completely transparent.
  • a scale can also be appropriate here.
  • the aerosol container can consist of a plastic which, during injection molding of the preform, has a ratio of its flow length to a wall thickness to be produced in injection molding of 20 to 70.
  • the injection molding process of the aerosol container can be carried out with an economically justifiable cycle time and, on the other hand, thermally induced stresses in the preform as a result of the different contraction of the plastic material on the outer wall and on the inner wall of the preform that occurs during cooling can be largely avoided.
  • the aerosol container designed as an injection-molded preform can consist of a plastic, in particular a polyester, which has an intrinsic viscosity of 0.7 dl/g to 1.6 dl/g, preferably 0.78 dl/g to 0. 90 dl/g measured according to ASTM D4603.
  • a plastic in particular a polyester, which has an intrinsic viscosity of 0.7 dl/g to 1.6 dl/g, preferably 0.78 dl/g to 0. 90 dl/g measured according to ASTM D4603.
  • Gentle processing of such high-viscosity plastic materials which avoids excessive degradation, can indeed require increased effort, and in particular the dwell times of the plastic material in the preform production device can increase.
  • the gentle processing can counteract the formation of tension when the preform cools down.
  • the degradation mentioned leads to a splitting and thus to a shortening of the polymer molecular chains.
  • Degradation can occur as a result of melting and shearing of the plastic material to be processed in the extruder screw, which can ultimately lead to a reduction in the viscosity of the plastic material.
  • long molecular chains are desirable, since preforms with long molecular chains lead to greater strength in the plastic containers made from the preforms and to greater resistance of the container to internal pressure, impact, creep and bursting.
  • the large injection point of 5 mm to 9.5 mm can guarantee this long chain.
  • the opening directly at the entrance to the preform cavity also has this increased diameter in order to reduce the back pressure on the extruder.
  • the molten plastic material in particular the molten polyester material, can have a viscosity greater than 0.7 dl/g, preferably 0.78 dl/g to 0. 90 dl/g. Due to the large diameter of the injection point or the entry into the preform cavity, a parallel alignment of the polymer molecule chains can be largely avoided and the desired viscosity can be maintained. As a result, an excessive alignment of the molecular chains and a subsequent crystallization can be avoided, which would be detectable on the preform as a turbidity detectable with the naked eye.
  • Plastic materials with the specified high viscosities are known, for example, from the extrusion blow molding process, in which the viscosity of the plastic material must be high enough so that a continuous plastic tube can be extruded without the plastic material dripping off.
  • the viscosity of these plastic materials is so high that with the usual production methods for preforms in an injection molding process, or in a combination of injection molding and extrusion processes can only be processed with high pressure and / or high temperatures.
  • the injection molding can be done with a needle valve of the melt channel.
  • a hot runner or a cold runner process can be used with a short or with a long injection point.
  • the desired higher viscosities can also be achieved with low-viscosity plastics by drying them to a viscosity of 0.7 dl/g to 1.6 dl/g, preferably 0.78, in a separate drying process under vacuum or nitrogen before entering the extruder dl/g to 0.90 dl/g.
  • the aerosol container can have one or more layers.
  • the plastic container can comprise a main plastic component from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene furanoate, polypropylene furanoate, polybutylene furanoate, polylactide, their copolymers and mixtures of the plastics mentioned.
  • the plastics listed are very similar in terms of their processability. They allow transparent plastic containers to be produced in an injection molding process, which in particular meets the desire for transparent pressurized aerosol containers.
  • the main plastic component can consist partly or entirely of regenerated material.
  • PET and PEF they can also be made, at least in part, from biological raw materials.
  • the plastic materials used can have short or long chain branches.
  • the polymer molecular chains can have so-called grafted branches or long chain branching (LCB) in order to achieve the desired high viscosity.
  • the polymer molecular chains can also contain so-called functional groups, which only lead to the desired branching during the production of the preform by injection molding.
  • the plastic material can also contain additives which can lead to any type of branching of the polymer molecule chains during injection molding. So-called chain extenders are an example of such additives. However, care is taken to ensure that no crosslinking occurs, which would prevent thermoplastic deformation of the plastic material.
  • the main plastic component of the injection molded plastic container can contain up to 20 percent by weight of foreign matter.
  • copolymers, dyes, UV blockers, stabilizing additives such as glass fibers or glass beads or mixtures thereof, additives or foreign polymers can be added to the main plastic component in order to achieve the desired properties of the injection-molded plastic container, such as UV resistance and UV absorption, water vapor and oxygen impermeability and the like.
  • the aerosol container can consist of a plastic whose main plastic component is other plastics from the group consisting of PEN, PEF, PLA, polyester, polyamide, polybutylene terephthalate, polycarbonate, polyolefins, silicones, their copolymers and mixtures of the plastics mentioned are added .
  • the plastic aerosol container produced according to the invention as an injection-molded preform can, in principle, have different packaging sizes. However, it can prove to be particularly useful for packaging sizes of less than 50 ml. A volume limited by an inner wall of the preform is to be seen as the packaging size. Such small packaging sizes can be used, for example, for nasal sprays, for insecticides, for liquids containing nicotine and the like.
  • an aerosol container whose circumference of the standing area is essentially equal to a circumference of the preform body.
  • the term “essentially the same” is intended to express that due to different shrinkage when cooling to room temperature between the preform body and the standing area, slight differences in the circumference of the preform body and the circumference of the standing area can occur.
  • the two circumferences are the same.
  • the cross section of the preform body is not necessarily circular, but can have any geometric shape as long as it is not Has undercuts.
  • the inner contour can have a circular cross section and the outer contour can form a polygon, for example a regular hexagon.
  • an aerosol container whose circumference of the standing area is smaller than a circumference of the preform body.
  • the preforms are cooled in so-called cooling tubes outside the injection molding machines in many injection molding machines. In this case, it is usual to apply a vacuum of between 0.05 and 0.95 bar on the outside of the preforms.
  • the preforms are flushed with cold air, with internal pressures of up to around 10 bar being generated. Since the material of the preform is still deformable when it is inserted into the colling tubes, the preform body can be enlarged by negative pressure and/or positive pressure without changing its material properties in the cooled state.
  • an axial enlargement and/or a radial enlargement of the preformed body by up to 3 mm is possible, ie an enlargement by 6 mm is possible in diameter.
  • the standing area of the plastic container is not affected.
  • the circumferential shape of the preformed body can also be changed by applying the negative pressure and/or positive pressure, for example a hexagon or an oval can be produced.
  • an immersion hose or an immersion tube for removing the liquid is permanently connected to the valve unit, the free end of which ends at the lowest point of the convex, dome-shaped preform base.
  • the liquid collects at the lowest point of this bottom. Because the free end of the hose ends at the lowest point of this floor, it can be emptied without any problems. Residual emptying is possible regardless of the position of the print head, which is usually arranged rotatably on the valve unit.
  • the plastic aerosol container shown is provided with the reference numeral 1 in its entirety.
  • the aerosol container 1 is designed as an injection-molded preform and has an elongated, tube-like preform body 2 to which a neck 4 with an opening 5 is connected.
  • the neck 4 can, for example, have a collar 41 bordering the opening 5 with a groove 42 running around in the form of a ring.
  • the collar 41 with the annular peripheral groove 42 facilitates the assembly of a dispensing device, not shown, for example a valve unit, for a liquid stored in the aerosol container under pressure from a liquid or gaseous propellant.
  • the figures do not show the valve unit for dispensing an aerosol, which is mounted pressure-tight on the neck of the aerosol container and can be actuated by means of a push button.
  • two pointed elevations 43 are formed in a ring shape and extending parallel to one another. These elevations 43 can be covered by a rubber seal. During the crimping process, the elevations can be pressed into the rubber seal, resulting in a connection between the valve unit and aerosol container that is resistant to the internal pressure .
  • the jacket 61 and the outer wall 21 thus form a circular cylinder in the exemplary embodiment presented here.
  • the standing area 6 protrudes beyond a preform base, which closes off the preform body 2 at its longitudinal end opposite the neck 4 . In 1 the base of the preform is covered by the standing area 6, which is designed as a cylinder section that is closed in the circumferential direction.
  • the preform body 2 shows the aerosol container 1 in a representation cut along a longitudinal axis A on one side.
  • the preform body 2 has a wall thickness of 1 mm to 6 mm.
  • the preformed body 2 can be tapered, forming a shoulder 22 .
  • the neck 4 has two radially outwardly extending collars 41 which are spaced apart from one another by an annular circumferential groove 42. The upper of the two collars 41 essentially adjoins the upper side 40 of the preform neck 4 .
  • the preform bottom 3 arranged at the axial longitudinal end of the preform body 2 opposite the neck 4 has a convex, ie outwardly extending, dome-shaped shape and has a wall thickness b of 1 mm to 6 mm.
  • the wall thickness of the preform base 3 and the wall thickness w of the preform body 2 can be different from one another.
  • the dome-shaped shape of the preform base 3 approximates the shape of a spherical segment. As a result, bending stresses in the container bottom 3 caused by internal pressure can be avoided.
  • the stand section again provided with the reference number 6 , is designed as a hollow-cylindrical extension of the wall of the preformed body 2 .
  • the standing section has a wall thickness s of 1 mm to 6 mm.
  • the wall thickness s of the standing section 6 can be different from the wall thickness w of the preformed body 2 .
  • the wall thickness of the standing section 6 can decrease toward its free end.
  • the upright position of the aerosol container 1 placed on its standing area 6 on a flat surface G is regarded as the usage position.
  • the injection of the plastic to produce the aerosol container 1 does not have to take place at the injection point 31, which is essentially in the middle on the bottom, but also at any other point of the aerosol container 1.
  • the plastic can also be injected at several points will.
  • the aerosol container can be overmoulded with a plastic, for example in a different color (2-layer) or contain a colored layer (3-layer).
  • the aerosol container can also contain a barrier layer.
  • FIG. 12 shows an aerosol container 1' similar to the aerosol container 1 from 1 '
  • This aerosol container 1' was cooled outside the injection molding machine in a so-called cooling tube, which has a larger inside diameter than the outside diameter of the sprayed aerosol container provided for cooling. After inserting the sprayed aerosol container into the cooling tube, it was cooled to room temperature by applying a negative pressure and flushing the interior of the aerosol container with cold air under positive pressure.
  • material of the preform body was pressed against the inner wall of the cooling tubes and the preform body 2' increased in its circumference. Accordingly, the outer wall 21' of the aerosol container 1' removed from the cooling tube protrudes beyond the standing area 6.
  • the aerosol container 1, which is designed as an injection-molded preform and is resistant to internal pressure, has, for example, an overall axial length of 70.5 mm+1.5 mm.
  • the length of Neck 4 is 5.1 mm, for example.
  • An outside diameter of the preform body 2 is 19.3 mm, for example.
  • An outside diameter of the two collars 41 arranged on the neck 4 is, for example, 19.9 mm+0.1 mm.
  • the wall thickness w of the preform body is 3.4 mm, for example.
  • the wall thickness w of the preformed body 2 tapers towards the neck 4, forming the shoulder 22. At a narrowest point at the transition from the shoulder 22 to the neck 4, the preformed body 2 has an outside diameter of 16.6 mm, for example.
  • the wall thickness b of the container bottom 3 is 2.8 mm, for example.
  • the distance d by which the standing area 6 protrudes beyond the lowest point 31, for example the injection point of the aerosol container 1, is 2 mm, for example.
  • the wall thickness s of the standing area 6 typically corresponds to 50 to 100% of the wall thickness of the preformed body 2. Where not stated otherwise, the tolerance of the mass is ⁇ 0.3 mm.
  • the aerosol container 1, 1' made of plastic is designed as an injection-molded preform.
  • injection molded is also understood to mean a combination of injection molding and extrusion processes.
  • a main plastic component of the preform is used, which makes up at least 80% of the total mass of the preform and which, when entering a preform cavity, has a viscosity, measured according to ASTM D4603, which is at most 0.15 dl lower than the initial viscosity of the main plastic component /g has degraded.
  • the viscosity of the main plastic component on entry into the extruder is adjusted to 0.7 dl/g to 1.6 dl/g, preferably 0.78 dl/g to 0.90 dl/g.
  • At least the preform body 2 of the preform can have one or more layers and consist of at least 80 percent by weight (% w/w) of a plastic main component from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene furanoate, polylactide, their copolymers and mixtures of the plastics mentioned .
  • a plastic main component from the group consisting of polyethylene terephthalate, polyethylene naphthalate, polyethylene furanoate, polylactide, their copolymers and mixtures of the plastics mentioned .
  • Up to 20% w/w of foreign substances can be mixed into the main plastic component.
  • copolymers, dyes, UV blockers, stabilizing additives such as glass fibers or glass beads or mixtures thereof, additives or foreign polymers can be admixed to the main plastic component.
  • the main plastic component can also have other plastics from the group consisting of PEN, PEF, PPF, PBF PLA, polyester, polyamide, polybutylene terephthalate, polycarbonate, polyolefins, silicones, their copolymers and mixtures of the plastics mentioned.
  • the proposed aerosol container which is designed as an injection-moulded preform, is resistant to internal pressure, exhibits little to no tension and is resistant to the phenomenon of stress cracking. Due to the plastics used, the aerosol container can also be transparent at least in certain areas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Nozzles (AREA)
EP17746066.4A 2016-09-12 2017-07-27 Aerosolbehälter aus kunststoff Active EP3509809B1 (de)

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PL17746066T PL3509809T3 (pl) 2016-09-12 2017-07-27 Zbiornik na aerozol z tworzywa sztucznego

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CH01183/16A CH712902A1 (de) 2016-09-12 2016-09-12 Innendruckbeständiger Kunststoffbehälter, insbesondere Kunststoff-Aerosolbehälter.
PCT/EP2017/068982 WO2018046175A1 (de) 2016-09-12 2017-07-27 Aerosolbehälter aus kunststoff

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WO2018046175A1 (de) 2018-03-15
ES2920135T3 (es) 2022-08-01
CH712902A1 (de) 2018-03-15
MX2019002311A (es) 2019-07-04
BR112019003581B1 (pt) 2022-09-27
PL3509809T3 (pl) 2022-06-20
US11897641B2 (en) 2024-02-13
CN109789600B (zh) 2021-09-28
EP3509809A1 (de) 2019-07-17
US20190225355A1 (en) 2019-07-25
CN109789600A (zh) 2019-05-21
BR112019003581A2 (pt) 2019-05-21

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